public class Node {
	int frequency;
	String characterString;
	Node left;
	Node right;
	
	public Node(String characterString, int frequency){
		this.characterString = characterString;
		this.frequency = frequency;
	}
	
	public Node(int frequency) {
		this.frequency = frequency;
		this.characterString = "\0";
		left = null;
		right = null;
	}
	
	public Node() {
		this.characterString = "\0";
	}
}
